ID:83017 Can't use feature <name> of altmult_accum megafunction with <name> device family

CAUSE: You tried to use the specified feature of the MegaWizard Plug-In Manager .

ACTION: If you want to use the specified feature, change the device family. If want to use the specified device family, disable the feature, or use logic cell implementation. To avoid receiving this message in the future, Intel recommends using the MegaWizard Plug-In Manager.